LeetCode/LeetCode-345.cpp at master · hello-sources/LeetCode · GitHub

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/*************************************************************************
    > File Name: LeetCode-345.cpp
    > Author: ltw
    > Mail: 3245849061@qq.com
    > Created Time: Thu 21 May 2020 07:17:06 PM CST
 ************************************************************************/

#include <iostream>
using namespace std;


class Solution {
public:
    bool is_valid(char ch) {
        if (ch < 97) ch += 32;
        switch (ch) {
            case 'a':
            case 'e':
            case 'i':
            case 'o':
            case 'u': return true;
        }
        return false;
    }
    string reverseVowels(string s) {
        for (int i = 0, j = s.size() - 1; i < j; i++, j--) {
            while (i < j && !is_valid(s[i])) ++i;
            while (i < j && !is_valid(s[j])) --j;
            if (i >= j) break;
            swap(s[i], s[j]);
        }
        return s;
    }
};